Methods, architectures, apparatuses and systems for unlicensed spectrum operations with massively distributed mimo

Abstract

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for unlicensed spectrum operations in massively distributed MIMO. A wireless transmit-receive unit, WTRU, may perform adaptive unlicensed operation and procedure for massively distributed MIMO. The WTRU may be (pre-)configured with information about multiple TRPs/TCIs for unlicensed spectrum operations. The WTRU may determine a degree of channel uncertainty. The WTRU may determine a TRP-TCI group and a TRP-TCI set within the determined TRP-TCI group, and may report to the network LBT status for the determined TRP-TCI set. Following the reporting, the WTRU may receive an indication of scheduling resources for the determined TRP-TCI set, and may receive PDSCH or PUSCH transmission according to the indicated scheduling resources.

1 - 14 . (canceled) 
     
     
         15 . A method implemented by a wireless receive-transmit unit (WTRU) in a network, wherein the method comprises:
 receiving, from the network, configuration information about multiple transmission-reception points (TRPs) and multiple transmission configuration information (TCI), for operation of the WTRU in shared or unlicensed spectrum;   determining, from the received configuration information, an indication scheme, the determined indication scheme containing a first indicator and a second indicator;   determining a channel uncertainty level;   determining a TRP-TCI group, based on the first indicator, and a TRP-TCI set within the determined TRP-TCI group from the second indicator;   reporting, to the network, the channel uncertainty level, for the determined TRP-TCI set;   receiving, from the network, following the reporting, an indication of scheduling resources for the determined TRP-TCI set; and   receiving physical downlink shared channel (PDSCH) transmission or transmitting physical uplink shared channel (PUSCH) transmission according to the indicated scheduling resources.   
     
     
         16 . The method of  claim 15 , wherein the second indicator indicates a TRP-TCI set of a first size and a TRP-TCI set of a second size larger than the first size, and wherein the channel uncertainty level determines the TRP-TCI set of the first size or the TRP-TCI set of the second size. 
     
     
         17 . The method of  claim 16 , comprising selecting the TRP-TCI set of the first size for a first channel uncertainty level, and selecting the TRP-TCI set of the second size for a second channel uncertainty level higher than the first channel uncertainty level. 
     
     
         18 . The method of  claim 15 , wherein channel uncertainty level is determined based on listen-before-talk (LBT) failure, or on non-acknowledge-to-acknowledge (NACK-to-ACK) ratio. 
     
     
         19 . The method of  claim 15 , wherein the reporting comprises listen-before-talk (LBT) status. 
     
     
         20 . The method of  claim 19 , wherein the LBT status is determined by performing energy detection. 
     
     
         21 . The method of  claim 19 , wherein the LBT status is determined based on an non-acknowledge-to-acknowledge (ACK-to-NACK) ratio for the determined TRP-TCI set. 
     
     
         22 . The method of  claim 19 , wherein the LBT status is determined based on LBT failure ratio for the determined TRP-TCI set. 
     
     
         23 . The method of  claim 19 , wherein the LBT status is determined based on interference level for the determined TRP-TCI set. 
     
     
         24 . A wireless receive-transmit unit (WTRU) in a network, the WTRU comprising at least one processor, wherein the at least one processor is configured to:
 receive, from the network, configuration information about multiple transmission-reception points (TRPs), and multiple transmission configuration information (TCI), for operation of the WTRU in shared or unlicensed spectrum;   determine, from the received configuration information, an indication scheme, the determined indication scheme containing a first indicator and a second indicator;   determine a channel uncertainty level;   determine a TRP-TCI group, based on the first indicator, and a TRP-TCI set within the determined TRP-TCI group from the second indicator;   report the channel uncertainty level to the network, for the determined TRP-TCI set;   receive, from the network, following the reporting, an indication of scheduling resources for the determined TRP-TCI set; and   receive physical downlink shared channel (PDSCH) transmission or transmit physical uplink shared channel (PUSCH) transmission according to the indicated scheduling resources.   
     
     
         25 . The WTRU of  claim 24 , wherein the second indicator indicates a TRP-TCI set of a first size and a TRP-TCI set of a second size larger than the first size, and wherein the channel uncertainty level determines the TRP-TCI set of the first size or the TRP-TCI set of the second size. 
     
     
         26 . The WTRU of  claim 25 , wherein the at least one processor is configured to select the TRP-TCI set of the first size for a first channel uncertainty level, and to select the TRP-TCI set of the second size for a second channel uncertainty level higher than the first channel uncertainty level. 
     
     
         27 . The WTRU of  claim 24 , wherein channel uncertainty level is determined based on listen-before-talk (LBT) failure, or on non-acknowledge-to-acknowledge (NACK-to-ACK) ratio. 
     
     
         28 . The WTRU of  claim 24 , wherein the at least one processor is configured to comprise, in the report, listen-before-talk (LBT) status. 
     
     
         29 . The WTRU of  claim 28 , wherein the at least one processor is configured to determine the LBT status according to at least one of:
 by performing energy detection;   based on acknowledge-to-non-acknowledge (ACK-to-NACK) ratio of the determined TRP-TCI set;   based on LBT failure ratio for the determined TRP-TCI set; and   based on interference level for the determined TRP-TCI set.